Air enters the compressor of a regenerative gas-turbine engine at $310 K$ and $100 kPa$ , where it is compressed to $900 kPa$ and $650 K$ . The regenerator has an effectiveness of 70 percent, and the air enters the turbine at $1400 K$ . For a turbine isentropic efficiency of $90%$ , determine a) Determine the amount of heat transfer in the regenerator [15] b) Develop an expression for the thermal efficiency of the system $[4]$ c) Using your expression developed determine the efficiency of the $[6]$ system Figure 2: Regenerative Gas Turbine

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Air enters the compressor of a regenerative gas-turbine engine at

310 K

and

100 kPa

, where it is compressed to

900 kPa

and

650 K

. The regenerator has an effectiveness of 70 percent, and the air enters the turbine at

1400 K

. For a turbine isentropic efficiency of

90%

, determine a) Determine the amount of heat transfer in the regenerator [15] b) Develop an expression for the thermal efficiency of the system

[4]

c) Using your expression developed determine the efficiency of the

[6]

system Figure 2: Regenerative Gas Turbine

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